I recently purchased a 4532. Initially I had an odd problem where I got no audio via the coxial feed. That seemed to get fixed by a hard reboot. But I still have a lingering problem --- Everytime I change channels, I get a brief (2-4 seconds) of the "av signal loss" screen, before it then "finds" the feed again and restores the picture. I do not see this problem on my 5040 (same cable box and cables). I thought I'd read about this problem in the forum but was unable to find anything about it by searching. I did find a post from today where someone was getting this and it was suggested the problem was a lack of disk space -- that clearly isn't my problem. Any ideas?